glsl2: Don't mark a variable as constant if it was used as an out param.
diff --git a/src/glsl/ir_constant_variable.cpp b/src/glsl/ir_constant_variable.cpp
index ef5e1e4..c5ccd52 100644
--- a/src/glsl/ir_constant_variable.cpp
+++ b/src/glsl/ir_constant_variable.cpp
@@ -47,6 +47,7 @@
class ir_constant_variable_visitor : public ir_hierarchical_visitor {
public:
virtual ir_visitor_status visit_enter(ir_assignment *);
+ virtual ir_visitor_status visit_enter(ir_call *);
exec_list list;
};
@@ -107,6 +108,28 @@
return visit_continue;
}
+ir_visitor_status
+ir_constant_variable_visitor::visit_enter(ir_call *ir)
+{
+ exec_list_iterator sig_iter = ir->get_callee()->parameters.iterator();
+ foreach_iter(exec_list_iterator, iter, *ir) {
+ ir_rvalue *param_rval = (ir_rvalue *)iter.get();
+ ir_variable *param = (ir_variable *)sig_iter.get();
+
+ if (param->mode == ir_var_out ||
+ param->mode == ir_var_inout) {
+ ir_variable *var = param_rval->variable_referenced();
+ struct assignment_entry *entry;
+
+ assert(var);
+ entry = get_assignment_entry(var, &this->list);
+ entry->assignment_count++;
+ }
+ sig_iter.next();
+ }
+ return visit_continue;
+}
+
/**
* Does a copy propagation pass on the code present in the instruction stream.
*/